CONSTRUCTION UPDATE

Week of June 1, 2026
 
 
 

Project Overview

The California Department of Transportation (Caltrans) is making improvements to Interstate 405 (I-405), between Interstate 5 (I-5) and Harbor Boulevard. The project will improve safety for all modes of travel, increase the life expectancy of pavement, enhance traffic operations, and mitigate congestion.

Project Improvements

Enhance safety for traveling public and maintenance crews.


Repair and replace concrete slabs, lanes, traffic loop detectors, and bridge rehabilitation.


Traffic management system improvements, including ramp and roadway enhancements, and an updated metering system.


Irrigation and landscape enhancements.


NEW! Park and Ride facility located on Bristol Street at SB I-405.

Contact Us

Email:

Info@revivethe405.com


Helpline:

714-868-6998


Website:

www.ReviveThe405.com
 
 

Nightly lane, ramp, and connector closures are anticipated Monday night, June 1, through Sunday night, June 7, from 9 p.m. to 5 a.m.*


*Construction schedule is subject to change.

Crews are conducting curb and ramp work, paving, and electrical activities at night on northbound (NB) and southbound (SB) I-405. These activities require nightly intermittent lane, ramp, and connector closures.


Please be advised that this work may be loud. Follow detour signs in place to navigate around closures.

Intermittent Freeway Lane Closures:

  • NB I-405 from I-5 to Harbor Boulevard
  • NB SR-133 from I-405 to I-5
  • SB I-405 from SR-73 to I-5
  • SB SR-133 from I-5 to I-405


Intermittent Ramp Closures*:

  • NB I-405 off-ramp to Entertainment/Irvine Center Drive
  • NB I-405 on-ramp from WB Sand Canyon Avenue                              
  • NB I-405 loop on-ramp from EB Sand Canyon Avenue                                  
  • NB I-405 off-ramp to Sand Canyon Avenue                                     
  • NB I-405 on-ramp from EB Jeffrey Road/University Drive                               
  • NB I-405 loop on-ramp from WB University Drive/Jeffrey Road                         
  • NB I-405 on-ramp from WB Jamboree Road                                     
  • NB I-405 loop on-ramp from EB Jamboree Road                                
  • NB I-405 off-ramp to Jamboree Road                                    
  • NB I-405 loop on-ramp from WB MacArthur Boulevard
  • NB I-405 on-ramp from WB Bristol Street                                
  • NB I-405 loop on-ramps from EB Bristol Street                                   
  • NB I-405 off-ramp to Bristol Street
  • NB I-405 on-ramp from Fairview Road                                                      
  • SB I-405 off-ramp to Irvine Center Drive
  • SB I-405 on-ramp from EB Irvine Center Drive
  • SB I-405 off-ramp to Sand Canyon Avenue                              
  • SB I-405 loop on-ramp from WB Sand Canyon Avenue                                 
  • SB I-405 off-ramp to University Drive                                    
  • SB I-405 loop on-ramp from EB Jeffrey Road/University Drive                                  
  • SB I-405 on-ramp from WB University Drive/Jeffrey Road                               
  • SB I-405 off-ramp to Culver Drive                                                     
  • SB I-405 off-ramp to Jamboree Road                                    
  • SB I-405 loop on-ramp from WB Jamboree Road                                
  • SB I-405 off-ramp to MacArthur Boulevard                               
  • SB I-405 on-ramp from EB MacArthur Boulevard                                
  • SB I-405 off-ramp to Bristol Street                                
  • SB I-405 loop on-ramps from EB Bristol Street                                   
  • SB I-405 loop on-ramp from WB Bristol Street                                   
  • SB I-405 off-ramp to Fairview Road
  • SB I-405 on-ramp from Fairview Road


Intermittent Connector Closures:

  • NB I-405 Connector to NB and SB SR-55 
  • NB SR-55 Connector to SB I-405 
  • NB I-405 Connector to NB SR-55
  • NB I-5 Connector to NB I-405 
  • NB I-405 Connector to SB SR-133 
  • NB SR-133 Connector to NB I-405
  • SB I-405 Connector to NB SR-55 
  • SB SR-55 Connector to NB and I-405 
  • SB I-405 Connector to SB SR-133
  • SB I-405 Connector to NB SR-133     
  • SB SR-133 Connector to NB and SB I-405


Intermittent City Street Closures:

  • Bristol Street

   

* Consecutive ramps will not be closed at the same time.
 
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Caltrans District 12 | 1750 E 4th Street #100 | Santa Ana, CA 92705 US

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